<!DOCTYPE html>
<html>

<head>
  <meta charset="UTF-8">
  <title>flex-box练习</title>
  <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
  <style>
  </style>
</head>

<body>
  <div id="app">
    <input v-model="number">
    <p>数字:{{ number }}</p>
  </div>
  <script>
    let vm = new Vue({
      el: "#app",
      data: {
        number: "",
      }
    });

  </script>
</body>

</html>
